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Help with really high numbers
Posted Jul 4, 2016, 11:16 a.m. EDT Heat Transfer & Phase Change, Modeling Tools & Definitions, Parameters, Variables, & Functions Version 5.2 0 Replies
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I'm working on a producing a self-heating model for a wood chip pile. Currently the model is composed of a Heat Transfer through Porous media equation, and a custom General Form PDE, which models the heat produced by fungi in the pile.
The General Form PDE (g2) has 4 concentration variables, MBB (the easily degradeable parts of the wood), MHH (the parts of wood that are slowly degraded), XX (the fungi), and BO2 (the biological oxygen consumption).
The BO2 feeds into a variable called SBio which is multiplied by the oxycaloric coefficient to estimate the heat produced.
I'm having trouble with my model, as I'm getting some really high numbers, I'm expecting ~370 K tops, but I'm currently getting up to 50,000K....
Attached is my model, and the model I'm trying to build in Comsol (page. 444, equations 11 to 14).
Does anyone have some recommendations on how I could solve or troubleshoot it?
Thank you.
Attachments:
Hello Kristian Johnson
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